MDeX-1.3.3

移除 / Removed

• 移除「高清位图 PDF」导出：「PDF（矢量打印）」已能覆盖 PDF 导出需求（文字/公式任意放大清晰），故移除与之重叠的「PDF（高清位图）」选项，简化导出菜单（现为 Markdown / HTML / PDF（矢量打印）/ LaTeX）；顺带消除 macOS WKWebView 下位图路径末尾内容丢失（BUG-078）的根源。
  Removed "PDF (high-res raster)" export: "PDF (vector print)" already covers PDF export (text/formulas stay crisp at any zoom), so the overlapping "PDF (high-res raster)" option is removed to simplify the export menu (now Markdown / HTML / PDF (vector print) / LaTeX); this also eliminates the root cause of the trailing-content loss in the WKWebView raster path (BUG-078).

修复 / Fixes

• Windows 下相对路径图片不再无法渲染：Windows 安装版打开/新建含相对路径图片（如 ![](pic.png)）的文档、或粘贴/拖入图片时，渲染区图片此前一律不显示（macOS/Linux 正常）。根因是前端 dirOf/baseName 用 lastIndexOf("/")、relPath 用 split("/")，只认 Unix /；而 Rust 在 Windows 返回的是反斜杠绝对路径（C:\Users\…），导致 tab.dir 被算成空，resolveImages 的"无目录则跳过"守卫误杀所有相对路径图，粘贴图片的落盘目录还会拼成 /stem_images 写到盘符根目录。现让这三个函数同时认 / 与 \，Windows 下相对/绝对路径图片均正常渲染。该问题与编译工具链（MSVC / 交叉编译 GNU）无关，属纯前端逻辑，所有 Windows 运行版皆受影响（BUG-080）。
  Relative-path images now render on Windows: On the Windows build, opening/creating a document with relative-path images (e.g. ![](pic.png)), or pasting/dropping an image, left the render area blank (macOS/Linux were fine). Root cause: dirOf/baseName used lastIndexOf("/") and relPath used split("/") — Unix / only — but Rust returns backslash absolute paths on Windows (C:\Users\…), so tab.dir computed to empty and the "skip if no dir" guard in resolveImages killed every relative-path image (pasted images even landed in the drive root via /stem_images). These three helpers now accept both / and \, so relative and absolute images render correctly on Windows. This is a pure-frontend issue independent of the toolchain (MSVC / cross-compiled GNU) and affects every Windows build (BUG-080).

调整 / Changed

• 另存为格式弹窗:底部"取消"键改为右上角 ×:「另存为」时选择导出格式(Markdown / HTML / PDF / LaTeX)的自绘弹窗,原本在底部排一个"取消"按钮,现改为卡片右上角的 × 关闭按钮(与帮助、Mermaid 查看器等弹窗统一)。取消途径仍为三种等价:点右上角 ×、点遮罩空白、按 Esc。× 位置用 inset-inline-end,在阿拉伯/乌尔都等 RTL 语言下自动落到左上角。
  Save-as format dialog: bottom "Cancel" → top-right ×: The self-drawn format-picker (Markdown / HTML / PDF / LaTeX) shown on "Save As" previously placed a "Cancel" button in the bottom row; it's now a × close button in the card's top-right corner (consistent with the Help and Mermaid-viewer dialogs). Cancellation still works three equivalent ways: click ×, click the backdrop, or press Esc. The × uses inset-inline-end so it flips to the top-left under RTL languages (Arabic/Urdu/etc.).

修复 / Fixes

• 矢量 PDF 导出图片不再变问号：含相对路径图片的文档（如「MDeX 示例」的图标）在「另存为 PDF（矢量打印）」时，图片在生成的 PDF 里显示为问号（broken）；敲空格触发重渲后图标恢复、再导出又变问号，反复横跳。根因是导出前 preview.innerHTML = lastFullHtml 把预览重置回原始相对路径后直接打印，未把图片 resolve 成 data URL；而 lastFullHtml 快照里 <img> 始终是相对路径（resolveImages 只改 DOM 不回写字符串）。现打印前补 resolveImagesForExport（与导出同源处理），图片正常渲染。
  Vector-PDF images no longer show as broken: A document with relative-path images (e.g. the MDeX sample icon) rendered images as broken (?-icons) when saved via "Save as PDF (vector print)"; typing a space to re-render fixed it temporarily, but re-exporting broke it again. The export reset the preview to lastFullHtml (which always holds raw relative paths — resolveImages mutates only the DOM, not the snapshot) and printed without resolving images to data URLs. A resolveImagesForExport step is now run before printing, so images render correctly.